Table 1– Comparison of Xpert MTB/RIF (Xpert) (Cepheid, Sunnyvale, CA, USA) results with culture and clinical data
Sample typeXpert-positive and MTC-positive cultureXpert-negative and MTC-positive cultureXpert-positive, MTC-negative culture and TB diagnosisXpert-negative NTM-positive cultureXpert-positive, MTC-negative culture and non-TB diagnosisXpert-negative, MTC-negative cultureXpert-indeterminateTotal (% proportion)
Biopsy specimen#7111121902554368 (25.0)
Pleural fluid5103003124330 (24.4)
Gastric aspirate451331401490224 (15.2)
Pus40782201184195 (13.2)
CSF1121011185133 (9.0)
Urines1123611070130 (8.8)
Cavitary fluid5500084094 (6.4)
Total18850306121143171474 (100)
  • Data are presented as n, unless otherwise stated. Two samples that were Xpert-positive and Mycobacterium tuberculosis complex (MTC) culture-negative, from patients lacking a confident diagnosis, were not included in the table. TB: tuberculosis; NTM: nontuberculous mycobacteria; CSF: cerebrospinal fluid. #: including 119 fine-needle-aspirates; : including 60 peritoneal, 19 synovial and 15 pericardial fluid samples.